EP0638708A1 - Lubrification circuit with a valve-controlled filling device for an internal combustion engine - Google Patents

Lubrification circuit with a valve-controlled filling device for an internal combustion engine Download PDF

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Publication number
EP0638708A1
EP0638708A1 EP94110532A EP94110532A EP0638708A1 EP 0638708 A1 EP0638708 A1 EP 0638708A1 EP 94110532 A EP94110532 A EP 94110532A EP 94110532 A EP94110532 A EP 94110532A EP 0638708 A1 EP0638708 A1 EP 0638708A1
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EP
European Patent Office
Prior art keywords
oil
valve
line
pressure
refill
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Granted
Application number
EP94110532A
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German (de)
French (fr)
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EP0638708B1 (en
Inventor
Herbert Zöller
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Daimler Benz AG
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Daimler Benz AG
Mercedes Benz AG
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Publication of EP0638708A1 publication Critical patent/EP0638708A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M11/12—Indicating devices; Other safety devices concerning lubricant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0458—Lubricant filling and draining

Definitions

  • the invention relates to a lubricating oil circuit for an internal combustion engine with a suction pump in the lubricating oil supply of an oil pan for supplying lubricating oil to lubricating points of the internal combustion engine via a delivery line and with a valve-controlled refill device, according to the features specified in the preamble of claim 1.
  • Such a lubricating oil circuit is known from DE-AS 1 450 254, in which a refill device prevents overfilling or emptying of the oil sump of the internal combustion engine. Excess lubricating oil is pumped into an additional oil tank. A pressure pump with a lower output arranged in the refill line continuously pumps the oil from the additional container into the oil pan of the internal combustion engine. An electrically operable multi-way valve is provided downstream of this pressure pump, which connects the refill line to the oil pan or briefly to a distributor system for the lubrication of lubrication points located outside the internal combustion engine.
  • the invention has for its object to provide measures in the lubricating oil circuit of an internal combustion engine, by means of which, in addition to extending the oil change intervals, a frequent oil exchange can also be implemented and is always almost constant Oil level between a maximum and minimum limit value in the oil pan of the internal combustion engine is ensured.
  • the measures according to the invention enable automatic refilling of the engine or lubricating oil from the additional oil tank into the oil pan of the internal combustion engine in a simple manner, with rapid oil aging being avoided by replacing the engine oil which is always present. The need for the annoying refill of foreign oil no longer exists.
  • additional oil can be supplied continuously until a maximum oil level is reached in the oil pan through the pressure valve acted upon by engine oil pressure.
  • the spring-loaded pressure valve assumes its blocking position, in which no engine oil can flow from the oil pan into the additional oil tank or vice versa if the internal combustion engine is in an inclined position.
  • a total of engine oil can be refilled or can only be replaced by a route control, and in another case (claim 7) engine oil can be exchanged and refilled at the same time.
  • lubricating oil circuit 1 for an internal combustion engine 2 with a valve-controlled refill device or a lubricating oil supply compensation.
  • a suction pump denoted by 3 sucks lubricating oil from the lubricating oil supply of an oil pan 4 and conveys it via a delivery line 5 to lubrication points of the internal combustion engine 2, which are not shown in detail Interposition of a controllable and designed as a 2/2-way solenoid valve 9 leads.
  • the solenoid valve 9 receives a changeover pulse from the oil level sensor A and switches from its blocking position to the flow position. This position is maintained until a certain minimum oil level in the oil pan 4 is reached.
  • the flow position can also be maintained depending on the time, e.g. 30 seconds.
  • the lubricating oil circuit 1 has two solenoid valves 20, 21, which are designed as 3/2-way valves, as well as a spring-loaded displacement piston 22 and a check valve 23, which is arranged in a suction line 24 connected to the additional oil container 8.
  • an operating hours counter B sends a changeover pulse every four hours to the solenoid valve 20 interposed in the pressure oil supply line 7, which is transferred from its rest position to the open position, whereby pressurized engine oil flows into a cylinder 25 and moves it in the cylinder 25 longitudinally displaceable displacer 22 against the Return spring 26 to the right.
  • the engine oil present in the spring chamber 27, which was previously sucked out of the additional oil tank 8 via the check valve 23, is displaced, fed into the refill line 10 and conveyed into the lubricating oil reservoir of the oil pan 4 via the pressure valve designed as a check valve 29.
  • the solenoid valve 20 switches back to the rest position shown and the return spring 26 now moves the displacer 22 back into its basic position, displaced motor oil being conveyed to the solenoid valve 21 via the solenoid valve 20.
  • This solenoid valve 21 controls (as shown) the oil flow depending on the oil level via an exchange line 27 into the additional oil tank 8 or in the other position of the solenoid valve 21 via a refill auxiliary line 28 into the oil pan 4.
  • the refill auxiliary line 28 opens downstream of the pressure valve or check valve 29 into the refill line 10th
  • FIG. 3 largely corresponds to that according to FIG. 1, but the pressure valve in the refill line 10 is a check valve 29, furthermore a hydraulic motor 30 driven by the oil flow is provided in the pressure supply line 7 downstream of the solenoid valve 9 drives an oil pump 32 inserted in the refill line 10 upstream of the check valve 29.
  • the solenoid valve 9, a 2/2-way valve is switched into the open position by the oil level sensor, engine oil flows to the hydraulic motor 30 and from there into the ventilated additional oil tank 8 the driven oil pump 32 sucks oil from the additional oil tank 8 and pumps it into the oil pan 4.
  • the delivery rate of the oil pump 32 is slightly larger than the volume flow through the hydraulic motor 30; the oil level in the oil pan 4 thus rises only slowly.
  • the 2/2-way valve only returns to the initial position or closed position when the maximum oil level has been reached and is indicated by the oil level sensor A.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

In the pressure oil feed conduit (7) branching from the delivery conduit (5) a magnet valve (9) controlled by an oil lever indicator (A) on reaching a max. oil level in the sump (4) releases the flow connection to the additional oil tank (8). On reaching a min. oil level or dependent upon the time, the flow connection is held up through the magnet valve (9) moving into the closed position. The pressure valve (11) in both positions of the magnet valve is switched to the throughflow position in the fill-up conduit (10) leading to the oil sump. When the engine is shut down, the pressure valve moves back into a position stopping oil flow to the sump. The pressure valve is formed as a piston slider valve (11).

Description

Die Erfindung betrifft einen Schmierölkreislauf für eine Brennkraftmaschine mit einer Saugpumpe im Schmierölvorrat einer Ölwanne zur Schmierölversorgung von Schmierstellen der Brennkraftmaschine über eine Förderleitung und mit einer ventilgesteuerten Nachfülleinrichtung, nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a lubricating oil circuit for an internal combustion engine with a suction pump in the lubricating oil supply of an oil pan for supplying lubricating oil to lubricating points of the internal combustion engine via a delivery line and with a valve-controlled refill device, according to the features specified in the preamble of claim 1.

Aus der DE-AS 1 450 254 ist ein derartiger Schmierölkreislauf bekannt, bei dem eine Nachfülleinrichtung eine Überfüllung oder Entleerung des Ölsumpfs der Brennkraftmaschine vermeidet. Überschüssiges Schmieröl wird mittels einer Pumpe in einen Zusatzölbehälter gefördert. Eine in der Nachfülleitung angeordnete Druckpumpe mit geringerer Leistung fördert das Öl ständig aus dem Zusatzbehälter in die Ölwanne der Brennkraftmaschine. Stromab dieser Druckpumpe ist ein elektrisch betätigbares Mehrwegeventil vorgesehen, das die Nachfülleitung mit der Ölwanne oder kurzzeitig mit einer Verteileranlage für die Schmierung von außerhalb der Brennkraftmaschine gelegenen Schmierstellen verbindet.Such a lubricating oil circuit is known from DE-AS 1 450 254, in which a refill device prevents overfilling or emptying of the oil sump of the internal combustion engine. Excess lubricating oil is pumped into an additional oil tank. A pressure pump with a lower output arranged in the refill line continuously pumps the oil from the additional container into the oil pan of the internal combustion engine. An electrically operable multi-way valve is provided downstream of this pressure pump, which connects the refill line to the oil pan or briefly to a distributor system for the lubrication of lubrication points located outside the internal combustion engine.

Der Erfindung liegt die Aufgabe zugrunde, im Schmierölkreislauf einer Brennkraftmaschine Maßnahmen vorzusehen, durch die neben einer Verlängerung der Ölwechselintervalle auch ein häufiger Ölaustausch realisierbar und stets ein nahezu gleichbleibender Ölstand zwischen einem maximalen und minimalen Grenzwert in der Ölwanne der Brennkraftmaschine sichergestellt ist.The invention has for its object to provide measures in the lubricating oil circuit of an internal combustion engine, by means of which, in addition to extending the oil change intervals, a frequent oil exchange can also be implemented and is always almost constant Oil level between a maximum and minimum limit value in the oil pan of the internal combustion engine is ensured.

Zur Lösung der Aufgabe dienen erfindungsgemäß die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale.According to the invention, the features specified in the characterizing part of patent claim 1 serve to achieve the object.

Durch die erfindungsgemäßen Maßnahmen ist auf einfache Weise eine selbsttätige Nachfüllung des Motor- bzw. Schmieröls aus dem Zusatzölbehälter in die Ölwanne der Brennkraftmaschine ermöglicht, wobei durch den Austausch des stets vorhandenen Motoröls eine schnelle Ölalterung vermieden wird. Die Notwendigkeit zur lästigen Fremdölnachfüllung besteht nicht mehr. In dem einen Fall (Anspruch 1) ist Zusatzöl bis zum Erreichen eines maximalen Ölstandes in der Ölwanne durch das von Motoröldruck beaufschlagte Druckventil kontinuierlich zuführbar. Bei Motorstillstand nimmt das federbelastete Druckventil seine Sperrstellung ein, in der bei ungünstigen schräglagen der Brennkraftmaschine kein Motoröl aus der Ölwanne in den Zusatzölbehälter oder umgekehrt fließen kann. In dem anderen Fall (Anspruch 4) ist durch eine Wegesteuerung entweder insgesamt Motoröl nachfüllbar oder lediglich austauschbar und in einem weiteren Fall (Anspruch 7) Motoröl austauschbar und gleichzeitig nachfüllbar.The measures according to the invention enable automatic refilling of the engine or lubricating oil from the additional oil tank into the oil pan of the internal combustion engine in a simple manner, with rapid oil aging being avoided by replacing the engine oil which is always present. The need for the annoying refill of foreign oil no longer exists. In the one case (additional claim), additional oil can be supplied continuously until a maximum oil level is reached in the oil pan through the pressure valve acted upon by engine oil pressure. When the engine is at a standstill, the spring-loaded pressure valve assumes its blocking position, in which no engine oil can flow from the oil pan into the additional oil tank or vice versa if the internal combustion engine is in an inclined position. In the other case (claim 4), a total of engine oil can be refilled or can only be replaced by a route control, and in another case (claim 7) engine oil can be exchanged and refilled at the same time.

In den jeweiligen Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben.In the respective subclaims, further developments of the invention are given.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt und im folgenden näher beschrieben. Es zeigen:

Fig.1
einen Schmierölkreislauf mit ventilgesteuerter Nachfülleinrichtung mit druckgesteuertem Kolbenschieberventil,
Fig. 2
eine andere Ausgestaltung des Schmierölkreislaufs mit Verdrängerkolben und
Fig. 3
eine andere Ausgestaltung des Schmierölkreislaufs mit einem gesteuerten Hydrosystem.
Exemplary embodiments of the invention are shown in the drawing and described in more detail below. Show it:
Fig. 1
a lubricating oil circuit with valve-controlled refill device with pressure-controlled piston valve,
Fig. 2
another embodiment of the lubricating oil circuit with displacement piston and
Fig. 3
another embodiment of the lubricating oil circuit with a controlled hydraulic system.

In Fig. 1 ist ein Schmierölkreislauf 1 für eine Brennkraftmaschine 2 mit einer ventilgesteuerten Nachfülleinrichtung bzw. einem Schmierölvorratsausgleich gezeigt.1 shows a lubricating oil circuit 1 for an internal combustion engine 2 with a valve-controlled refill device or a lubricating oil supply compensation.

Eine mit 3 bezeichnete Saugpumpe saugt aus dem Schmierölvorrat einer Ölwanne 4 Schmieröl und fördert es über eine Förderleitung 5 zu nicht näher dargestellten Schmierstellen der Brennkraftmaschine 2. Von der Förderleitung 5 zweigt stromab eines Rückschlagventiles 6 eine Druckölzuführleitung 7 ab, die zu einem belüfteten Zusatzölbehälter 8 unter Zwischenschaltung eines ansteuerbaren und als 2/2-Wegeventiles ausgebildeten Magnetventiles 9 führt. Eine Nachfülleitung 10 mit einem Druckventil 11, das als Kolbenschieberventil ausgeführt ist, verbindet den Zusatzölbehälter 8 mit der Ölwanne 4, und zwar mit einem Ansaugschnorchel 12 der Saugpumpe 3, der im Mündungsbereich der Nachfülleitung 10 als Venturidüse 13 ausgebildet ist. Eine von der Druckölzuführleitung 7 stromauf des Magnetventiles 9 wegführende Steuerleitung 14, alternativ kann sie auch von der Förderleitung 5 abzweigen, ist an dem Kolbenschieberventil 11 angeschlossen, welches aus einem federbelasteten und vom Motoröldruck beaufschlagbaren Kolben 15 mit einer Ringnut 16 besteht, die mit Steuerbohrungen 17,18 im zylindrischen Gehäuse 19 des Kolbenschieberventiles 11 zusammenwirkt.A suction pump denoted by 3 sucks lubricating oil from the lubricating oil supply of an oil pan 4 and conveys it via a delivery line 5 to lubrication points of the internal combustion engine 2, which are not shown in detail Interposition of a controllable and designed as a 2/2-way solenoid valve 9 leads. A refill line 10 with a pressure valve 11, which is designed as a spool valve, connects the additional oil tank 8 to the oil pan 4, specifically with an intake snorkel 12 of the suction pump 3, which is designed in the mouth area of the refill line 10 as a Venturi nozzle 13. A control line 14 leading away from the pressure oil supply line 7 upstream of the solenoid valve 9, alternatively it can also branch off from the delivery line 5, is connected to the spool valve 11, which consists of a spring-loaded piston 15 with an annular groove 16 which can be acted upon by the engine oil pressure and which has control bores 17 , 18 cooperates in the cylindrical housing 19 of the piston valve 11.

Bei Motorstart entsteht in der durchmessermäßig relativ kleinen Nachfülleitung 10, z.B. 2 mm Innendurchmesser, ein Unterdruck. Durch den Motoröldruck in der Förder-, Druckölzuführ- und Steuerleitung 5,7,14 wird bei geschlossenem Magnetventil 9 der druckbeaufschlagte Kolben 15 von seiner der Ruhestellung entsprechenden Sperrstellung in die Arbeitsstellung entgegen der Federkraft überführt und somit eine Nachfüllverbindung von dem Zusatzölbehälter 8 zur Ölwanne 4 hergestellt. Schmieröl wird aus dem Zusatzölbehälter 8 kontinuierlich abgesaugt.When the engine is started, a vacuum is created in the relatively small refill line 10, for example an internal diameter of 2 mm. By the engine oil pressure in the delivery, pressure oil supply and Control line 5, 7, 14, when the solenoid valve 9 is closed, the pressurized piston 15 is transferred from its blocking position corresponding to the rest position into the working position against the spring force, and thus a refill connection is made from the additional oil container 8 to the oil pan 4. Lubricating oil is continuously extracted from the additional oil tank 8.

Sobald der Ölstand in der Ölwanne 4 einen bestimmten maximalen Ölstand erreicht hat, erhält das Magnetventil 9 von dem Ölstandsgeber A einen Umschaltimpuls und schaltet von seiner Sperrstellung in Durchflußstellung. Diese Stellung wird solange beibehalten, bis ein bestimmter minimaler Ölstand in der Ölwanne 4 erreicht ist. Die Beibehaltung der Durchflußstellung kann auch zeitabhängig erfolgen, z.B. 30 Sekunden. Bei Durchflußstellung des Magnetventiles 9 wird kein Einfluß auf die Schaltstellung des Kolbens 15 ausgeübt, da der Druck in der Steuerleitung 14 ausreicht, den Kolben 15 weiterhin auf Durchgangsstellung zu halten. Erst bei Motorstillstand ergibt sich die Sperrstellung bzw. die Unterbrechung der Strömungsverbindung zwischen Ölwanne 4 und dem Zusatzölbehälter 8.As soon as the oil level in the oil pan 4 has reached a certain maximum oil level, the solenoid valve 9 receives a changeover pulse from the oil level sensor A and switches from its blocking position to the flow position. This position is maintained until a certain minimum oil level in the oil pan 4 is reached. The flow position can also be maintained depending on the time, e.g. 30 seconds. When the solenoid valve 9 is in the flow position, no influence is exerted on the switching position of the piston 15, since the pressure in the control line 14 is sufficient to keep the piston 15 in the open position. The blocking position or the interruption of the flow connection between the oil pan 4 and the additional oil tank 8 is only obtained when the engine is at a standstill.

In Fig. 2 weist der Schmierölkreislauf 1 zwei Magnetventile 20,21 auf, die als 3/2-Wegeventile ausgebildet sind, sowie einen federbelasteten Verdrängerkolben 22 und ein Rückschlagventil 23, das in einer an dem Zusatzölbehalter 8 angeschlossenen Saugleitung 24 angeordnet ist.2, the lubricating oil circuit 1 has two solenoid valves 20, 21, which are designed as 3/2-way valves, as well as a spring-loaded displacement piston 22 and a check valve 23, which is arranged in a suction line 24 connected to the additional oil container 8.

Bei dieser Ausführung sendet z.B. ein Betriebsstundenzähler B alle vier Stunden einen Umschaltimpuls an das in der Druckölzuführleitung 7 zwischengeschaltete Magnetventil 20, das von seiner dargestellten Ruhestellung in die Öffnungsstellung überführt wird, dabei fließt unter Druck stehendes Motoröl in einen Zylinder 25 und bewegt den in dem Zylinder 25 längsverschiebbar geführten Verdrängerkolben 22 gegen die Rückstellfeder 26 nach rechts. Gleichzeitig wird das in dem Federraum 27 vorhandene Motoröl, das zuvor über das Rückschlagventil 23 aus dem Zusatzölbehälter 8 angesaugt wurde, verdrängt, in die Nachfülleitung 10 geleitet und über das als Rückschlagventil 29 ausgebildete Druckventil in den Schmierölvorrat der Ölwanne 4 gefördert.In this embodiment, for example, an operating hours counter B sends a changeover pulse every four hours to the solenoid valve 20 interposed in the pressure oil supply line 7, which is transferred from its rest position to the open position, whereby pressurized engine oil flows into a cylinder 25 and moves it in the cylinder 25 longitudinally displaceable displacer 22 against the Return spring 26 to the right. At the same time, the engine oil present in the spring chamber 27, which was previously sucked out of the additional oil tank 8 via the check valve 23, is displaced, fed into the refill line 10 and conveyed into the lubricating oil reservoir of the oil pan 4 via the pressure valve designed as a check valve 29.

Nach etwa 30 Sekunden schaltet das Magnetventil 20 wieder in die gezeigte Ruhestellung um und die Rückstellfeder 26 bewegt jetzt den Verdrängerkolben 22 wieder in seine Grundstellung zurück, wobei verdrängtes Motoröl über das Magnetventil 20 zum Magnetventil 21 gefördert wird. Dieses Magnetventil 21 steuert (wie dargestellt) ölstandsgeberabhängig den Ölstrom über eine Austauschleitung 27 in den Zusatzölbehälter 8 oder in der anderen Stellung des Magnetventiles 21 über eine Nachfüllhilfsleitung 28 in die Ölwanne 4. Die Nachfüllhilfsleitung 28 mündet stromab des Druckventiles bzw. Rückschlagventiles 29 in die Nachfülleitung 10.After about 30 seconds, the solenoid valve 20 switches back to the rest position shown and the return spring 26 now moves the displacer 22 back into its basic position, displaced motor oil being conveyed to the solenoid valve 21 via the solenoid valve 20. This solenoid valve 21 controls (as shown) the oil flow depending on the oil level via an exchange line 27 into the additional oil tank 8 or in the other position of the solenoid valve 21 via a refill auxiliary line 28 into the oil pan 4. The refill auxiliary line 28 opens downstream of the pressure valve or check valve 29 into the refill line 10th

Das in Fig. 3 gezeigte Ausführungsbeispiel entspricht weitgehend demjenigen nach Fig. 1, jedoch ist das Druckventil in der Nachfülleitung 10 ein Rückschlagventil 29, ferner ist in der Druckzuführleitung 7 stromab des Magnetventiles 9 ein vom Ölstrom angetriebener Hydromotor 30 vorgesehen, der über eine Welle 31 eine in der Nachfülleitung 10 stromauf des Rückschlagventiles 29 eingesetzte Ölpumpe 32 antreibt.The embodiment shown in FIG. 3 largely corresponds to that according to FIG. 1, but the pressure valve in the refill line 10 is a check valve 29, furthermore a hydraulic motor 30 driven by the oil flow is provided in the pressure supply line 7 downstream of the solenoid valve 9 drives an oil pump 32 inserted in the refill line 10 upstream of the check valve 29.

Sobald bei diesem Schmierölkreislauf 1 der Ölstand einen minimalen Wert erreicht, wird durch den Ölstandsgeber das Magnetventil 9, ein 2/2-Wegeventil, in Öffnungsstellung geschaltet, Motoröl fließt zu dem Hydromotor 30 und von dort aus in den belüfteten Zusatzölbehälter 8. Gleichzeitig wird durch die angetriebene Ölpumpe 32 Öl aus dem Zusatzölbehälter 8 abgesaugt und in die Ölwanne 4 gepumpt. Die Förderleistung der Ölpumpe 32 ist geringfügig größer als der Volumenstrom durch den Hydromotor 30; der Ölstand in der Ölwanne 4 steigt somit nur langsam an.As soon as the oil level in this lubricating oil circuit 1 reaches a minimum value, the solenoid valve 9, a 2/2-way valve, is switched into the open position by the oil level sensor, engine oil flows to the hydraulic motor 30 and from there into the ventilated additional oil tank 8 the driven oil pump 32 sucks oil from the additional oil tank 8 and pumps it into the oil pan 4. The delivery rate of the oil pump 32 is slightly larger than the volume flow through the hydraulic motor 30; the oil level in the oil pan 4 thus rises only slowly.

Es wird also gleichzeitig Motoröl ausgetauscht und nachgefüllt.Engine oil is therefore exchanged and refilled at the same time.

Das 2/2-Wegeventil geht erst dann wieder in Ausgangsstellung bzw. Schließstellung zurück, wenn der maximale Ölstand erreicht ist und vom Ölstandsgeber A angezeigt wird.The 2/2-way valve only returns to the initial position or closed position when the maximum oil level has been reached and is indicated by the oil level sensor A.

Claims (8)

Schmierölkreislauf für eine Brennkraftmaschine mit einer Saugpumpe im Schmierölvorrat einer Ölwanne zur Schmierölversorgung von Schmierstellen der Brennkraftmaschine über eine Förderleitung, mit einer ventilgesteuerten Nachfülleinrichtung zur Ergänzung des in der Ölwanne vorhandenen Schmierölvorrats aus einem einen Zusatzölvorrat enthaltenden Zusatzölbehälter mit einer zwischen Ölwanne und Zusatzbehälter vorgesehenen Druckölzuführleitung und einer ein Druckventil aufweisenden Nachfülleitung,
dadurch gekennzeichnet,
daß in der von der Förderleitung (5) abzweigenden Druckölzuführleitung (7) ein von einem Ölstandsgeber (A) bei Erreichen eines maximalen Ölstands in der Ölwanne (4) ansteuerbares Magnetventil zur Freigabe der Strömungsverbindung zum Zusatzölbehälter (8) vorgesehen ist und daß bei Erreichen eines minimalen Ölstandes oder in Abhängigkeit von der Zeit die Strömungsverbindung durch das in Schließstellung überführbare Magnetventil (9) aufhebbar ist, und daß das Druckventil in beiden Stellungen des Magnetventiles (9) auf Durchflußstellung in der zur Ölwanne (4) führenden Nachfülleitung (10) geschaltet und beim Stillsetzen der Brennkraftmaschine in eine den Ölfluß zur Ölwanne sperrende Stellung einrückbar ist.Lubricating oil circuit for an internal combustion engine with a suction pump in the lubricating oil supply of an oil pan for supplying lubricating oil to lubricating points of the internal combustion engine via a delivery line, with a valve-controlled refill device for supplementing the lubricating oil supply in the oil pan from an additional oil container containing an additional oil supply with a pressure oil supply line provided between the oil pan and additional container and a Refill line with pressure valve,
characterized,
that in the pressure oil supply line (7) branching off from an oil level sensor (A) when a maximum oil level in the oil pan (4) can be actuated, a solenoid valve for releasing the flow connection to the auxiliary oil tank (8) is provided and that when a minimum oil level or depending on the time the flow connection can be canceled by the solenoid valve (9) which can be moved into the closed position, and that the pressure valve in both positions of the solenoid valve (9) is switched to the flow position in the refill line (10) leading to the oil pan (4) and when the internal combustion engine is stopped, it can be engaged in a position blocking the oil flow to the oil pan. Schmierölkreislauf nach Anspruch 1,
dadurch gekennzeichnet,
daß von der Druckölzuführleitung (7) stromauf des als 2/2-Wegeventil (9) ausgebildeten Magnetventiles eine mit dem Druckventil (11) in der Nachfülleitung (10) zusammenwirkende Steuerleitung (14) abzweigt und daß die Nachfülleitung (10) in einen verengten Querschnitt auf der Saugseite der Saugpumpe (3) einmündet.Lubricating oil circuit according to claim 1,
characterized,
that from the pressure oil supply line (7) upstream of the solenoid valve designed as a 2/2-way valve (9) branches off a control line (14) cooperating with the pressure valve (11) in the refill line (10) and that the refill line (10) has a narrowed cross section opens on the suction side of the suction pump (3). Schmierölkreislauf nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das Druckventil als Kolbenschieberventil (11) ausgebildet ist, das durch Druckölbeaufschlagung bei geschlossenem 2/2-Wegeventil (9) die zuvor unterbrochene Nachfülleitung (10) aufsteuert.Lubricating oil circuit according to claim 1 or 2,
characterized,
that the pressure valve is designed as a spool valve (11), which opens the previously interrupted refill line (10) by pressurized oil when the 2/2-way valve (9) is closed. Schmierölkreislauf für eine Brennkraftmaschine mit einer Saugpumpe im Schmierölvorrat einer Ölwanne zur Schmierölversorgung von Schmierstellen der Brennkraftmaschine über eine Förderleitung, mit einer ventilgesteuerten Nachfülleinrichtung zur Ergänzung des in der Ölwanne vorhandenen Schmierölvorrats aus einem einen Zusatzölvorrat enthaltenden Zusatzölbehälter, mit einer zwischen Ölwanne und Zusatzölbehälter vorgesehene Druckölzuführleitung und einer ein Druckventil aufweisenden Nachfülleitung,
dadurch gekennzeichnet,
daß in der von der Förderleitung (5) abzweigenden Druckölzuführleitung (7) ein zeitabhängig arbeitendes Magnetventil (20) vorgesehen ist, das einerseits mit einem ölstandsabhängig arbeitenden Magnetventil (21) zur Wegesteuerung der Strömungsverbindung zum Zusatzbehälter (8) oder direkt zur Nachfülleitung (10) und andererseits mit einem druckbeaufschlagbaren federbelasteten Verdrängerkolben (22) zusammenwirkt, durch den aus dem Zusatzbehälter (8) über ein Rückschlagventil (23) entnommenes Zusatzöl durch die Nachfülleitung (10) in die Ölwanne (4) förderbar ist.Lubricating oil circuit for an internal combustion engine with a suction pump in the lubricating oil supply of an oil pan for supplying lubricating oil to lubricating points of the internal combustion engine via a delivery line, with a valve-controlled refill device for supplementing the lubricating oil supply in the oil pan from an additional oil tank containing an additional oil tank, with a pressure oil supply line provided between the oil pan and additional oil tank and a pressure oil supply line a refill line with a pressure valve,
characterized,
that in the pressure oil supply line (7) branching off from the delivery line (7) there is provided a time-dependent magnetic valve (20) which on the one hand has an oil level-dependent magnetic valve (21) for controlling the flow connection to the additional container (8) or directly to the refill line (10) and, on the other hand, cooperates with a spring-loaded displacement piston (22) which can be pressurized and through which the additional oil removed from the additional container (8) via a check valve (23) can be conveyed through the refill line (10) into the oil pan (4). Schmierölkreislauf nach Anspruch 4,
dadurch gekennzeichnet,
daß beide Magnetventile als 3/2-Wegeventil (20,21) ausgebildet sind und bei eingerückter Arbeitsstellung des ersten 3/2-Wegeventiles (20) durch den in einem Zylinder (25) längsverschiebbar geführten Verdrängerkolben (22) verdrängtes Zusatzöl in die Ölwanne (4) förderbar ist, jedoch bei Ruhestellung des ersten 3/2-Wegeventiles (20) und Kolbendruckentlastung Motoröl über das zweite 3/2-Wegeventil (21) entweder über eine Nachfüllhilfsleitung (28) in die Ölwanne (4) oder über eine Austauschleitung (27) in den Zusatzölbehälter (8) leitbar ist.Lubricating oil circuit according to claim 4,
characterized,
that both solenoid valves are designed as a 3/2-way valve (20, 21) and, when the first 3/2-way valve (20) is in the engaged position, the additional oil displaced into the oil pan (20) by the displacer piston (22) which is longitudinally displaceable in a cylinder (25) 4) can be pumped, but when the first 3/2-way valve (20) is at rest and engine oil piston pressure is relieved via the second 3/2-way valve (21) either via a refill auxiliary line (28) into the oil pan (4) or via an exchange line ( 27) in the additional oil tank (8) is conductive. Schmierölkreislauf nach den Ansprüchen 4 u. 5,
dadurch gekennzeichnet,
daß das in der Nachfülleitung (10) angeordnete Druckventil als Rückschlagventil (29) ausgebildet ist.Lubricating oil circuit according to claims 4 u. 5,
characterized,
that the pressure valve arranged in the refill line (10) is designed as a check valve (29). Schmierölkreislauf für eine Brennkraftmaschine mit einer Saugpumpe im Schmierölvorrat einer Ölwanne zur Schmierölversorgung von Schmierstellen der Brennkraftmaschine über eine Förderleitung, mit einer ventilgesteuerten Nachfülleinrichtung zur Ergänzung des in der Ölwanne vorhandenen Schmierölvorrats aus einem einen Zusatzölvorrat enthaltenden Zusatzölbehälter, mit einer zwischen Ölwanne und Zusatzölbehälter vorgesehenen Druckölzuführleitung und einer Nachfülleitung,
dadurch gekennzeichnet,
daß in der von der Förderleitung (5) abzweigenden Druckölzuführleitung (7) ein von einem Ölstandsgeber (A) bei Unterschreiten eines definierten Ölstands in der Ölwanne (4) ansteuerbares Magnetventil sowie ein stromab von diesem liegenden Hydromotor (30) vorgesehen ist, durch den eine in der Nachfülleitung (10) angeordnete Ölpumpe (32) bei in Arbeitsstellung eingerücktem Magnetventil antreibbar ist, wobei die Förderleistung der Ölpumpe (32) größer ist der Volumenölstrom durch den Hydromotor (30).Lubricating oil circuit for an internal combustion engine with a suction pump in the lubricating oil supply of an oil pan for supplying lubricating oil to lubricating points of the internal combustion engine via a delivery line, with a valve-controlled refill device for supplementing the lubricating oil supply in the oil pan from an additional oil container containing an additional oil supply, with a pressure oil supply line provided between the oil pan and additional oil container and a pressure oil supply line Refill line,
characterized,
that in the pressure oil feed line (7) branching off from the delivery line (7) a solenoid valve which can be controlled by an oil level sensor (A) when the oil level (4) falls below a defined oil level, and a hydraulic motor (30) located downstream of this, through which one in the refill line (10) arranged oil pump (32) can be driven with the solenoid valve engaged in the working position, the The delivery rate of the oil pump (32) is greater than the volume oil flow through the hydraulic motor (30). Schmierölkreislauf nach Anspruch 7,
dadurch gekennzeichnet,
daß das in der Nachfülleitung (10) stromab der Ölpumpe (32) angeordnete Druckventil als Rückschlagventil (29) und das Magnetventil in der Druckölzuführleitung (7) als 2/2-Wegeventil ausgebildet ist.Lubricating oil circuit according to claim 7,
characterized,
that the pressure valve arranged in the refill line (10) downstream of the oil pump (32) is designed as a check valve (29) and the solenoid valve in the pressure oil supply line (7) is designed as a 2/2-way valve.
EP19940110532 1993-08-13 1994-07-06 Lubrification circuit with a valve-controlled filling device for an internal combustion engine Expired - Lifetime EP0638708B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4327262 1993-08-13
DE19934327262 DE4327262C1 (en) 1993-08-13 1993-08-13 Lubricating oil circuit with a valve-controlled top-up device for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0638708A1 true EP0638708A1 (en) 1995-02-15
EP0638708B1 EP0638708B1 (en) 1996-04-24

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ID=6495143

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (3)

Country Link
EP (1) EP0638708B1 (en)
DE (1) DE4327262C1 (en)
ES (1) ES2087781T3 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO1995035462A1 (en) * 1994-06-17 1995-12-28 Refrigerant Monitoring Systems Pty. Ltd. Oil level control apparatus
US6125642A (en) * 1999-07-13 2000-10-03 Sporlan Valve Company Oil level control system
DE102011084146A1 (en) 2011-10-07 2013-04-11 Bayerische Motoren Werke Aktiengesellschaft Lubrication system for internal combustion engine i.e. petrol engine, for vehicle, has electronic control device opening refilling valve when reaching predetermined lubrication oil level, so that lubrication oil is sucked into oil sump
US20150053505A1 (en) * 2013-08-05 2015-02-26 Briggs & Stratton Corporation Engine oil recirculation system for extended maintenance interval
USD852319S1 (en) 2015-11-13 2019-06-25 Briggs & Stratton Corporation Oil filter
USD926286S1 (en) 2017-09-15 2021-07-27 Briggs & Stratton, Llc Oil filter
CN114109555A (en) * 2021-11-30 2022-03-01 三一重机有限公司 Engine oil maintenance system, engineering machinery and engine oil maintenance method

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DE10011860B4 (en) * 2000-03-10 2008-03-13 Man Nutzfahrzeuge Ag Oil level sensor
DE102014006004B4 (en) * 2013-12-27 2020-10-01 Sms Group Gmbh Lubricant circuit, lubricant delivery method, lubricant conveyor and lubricant delivery pump
CN105443193B (en) * 2014-08-11 2019-04-16 刘新羽 A kind of automobile engine lubricating oil guarantees device and its control method
DE102016115778A1 (en) 2016-08-25 2018-03-01 Kriwan Industrie-Elektronik Gmbh Method for operating an oil level regulator

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DE4134568C1 (en) * 1991-10-19 1993-06-03 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Oil supply circuit for IC engine, partic. vehicle - has topping-up chamber with piston determining effective volume, controlled by sensor periodically detecting sump oil level

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DE4134568C1 (en) * 1991-10-19 1993-06-03 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Oil supply circuit for IC engine, partic. vehicle - has topping-up chamber with piston determining effective volume, controlled by sensor periodically detecting sump oil level

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035462A1 (en) * 1994-06-17 1995-12-28 Refrigerant Monitoring Systems Pty. Ltd. Oil level control apparatus
US5911289A (en) * 1994-06-17 1999-06-15 Waller; Clive Gregory Oil level control apparatus
US6125642A (en) * 1999-07-13 2000-10-03 Sporlan Valve Company Oil level control system
DE102011084146A1 (en) 2011-10-07 2013-04-11 Bayerische Motoren Werke Aktiengesellschaft Lubrication system for internal combustion engine i.e. petrol engine, for vehicle, has electronic control device opening refilling valve when reaching predetermined lubrication oil level, so that lubrication oil is sucked into oil sump
US20150053505A1 (en) * 2013-08-05 2015-02-26 Briggs & Stratton Corporation Engine oil recirculation system for extended maintenance interval
USD852319S1 (en) 2015-11-13 2019-06-25 Briggs & Stratton Corporation Oil filter
US10724406B2 (en) 2015-11-13 2020-07-28 Briggs & Stratton Corporation Small air-cooled engine assembly with dry sump lubrication system
US11293312B2 (en) 2015-11-13 2022-04-05 Briggs & Stratton, Llc Small air-cooled engine assembly with dry sump lubrication system
USD926286S1 (en) 2017-09-15 2021-07-27 Briggs & Stratton, Llc Oil filter
CN114109555A (en) * 2021-11-30 2022-03-01 三一重机有限公司 Engine oil maintenance system, engineering machinery and engine oil maintenance method

Also Published As

Publication number Publication date
ES2087781T3 (en) 1996-07-16
DE4327262C1 (en) 1994-10-20
EP0638708B1 (en) 1996-04-24

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